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A072903 Numbers m such that the discriminant of the quadratic field Q(sqrt(m) ) < m. 2
4, 9, 16, 18, 20, 25, 27, 32, 36, 45, 48, 49, 50, 52, 54, 63, 64, 68, 72, 75, 80, 81, 84, 90, 96, 98, 99, 100, 108, 112, 116, 117, 121, 125, 126, 128, 132, 135, 144, 147, 148, 150, 153, 160, 162, 164, 169, 171, 175, 176, 180, 189, 192, 196, 198, 200, 207, 208, 212 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Among terms are all the squares for which discriminant = 1

LINKS

Table of n, a(n) for n=1..59.

FORMULA

a(n) appears to be asymptotic to C*n with C=3.4.....

PROG

(PARI) isok(m) = quaddisc(m) < m; \\ Michel Marcus, Feb 18 2021

CROSSREFS

Cf. A037449, A072904.

Sequence in context: A313317 A292674 A313318 * A336919 A313319 A313320

Adjacent sequences:  A072900 A072901 A072902 * A072904 A072905 A072906

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Aug 10 2002

STATUS

approved

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Last modified October 17 13:10 EDT 2021. Contains 348048 sequences. (Running on oeis4.)